package cn.dxj1016.rabbitmqproducerconsumer.simple;

import com.rabbitmq.client.*;

import java.io.IOException;

public class Consumer {
    public static void main(String[] args) {
//        所有的中间件技术都是基于tcp/ip协议基础之上构建新型的协议规范，只不过rabbitmq遵循的是amqp协议
//        ip port
//        1：创建连接工程
        ConnectionFactory connectionFactory = new ConnectionFactory();
        connectionFactory.setHost("localhost");
        connectionFactory.setPort(5672);
        connectionFactory.setUsername("guest");
        connectionFactory.setPassword("guest");
        connectionFactory.setVirtualHost("/");

        Connection connection=null;
        Channel channel = null;
//        2：创建连接Connection
        try {
            connection = connectionFactory.newConnection("消费者");
//        3：通过连接获取通道Channel
            channel = connection.createChannel();
//        4：通过通道创建交换机，声明队列，绑定关系，路由key，发送消息，和接收消息
           channel.basicConsume("queue1", true, new DeliverCallback() {
               public void handle(String consumerTag, Delivery message) throws IOException {
                   System.out.println("收到消息是：" + new String(message.getBody(), "UTF-8"));
               }
           },new CancelCallback(){
                   public void handle(String  consumerTag) throws IOException{
                       System.out.println("接收失败了。。。");
                   }

           });
            System.out.println("开始接收信息");
            System.in.read();
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
//        7：关闭连接
            if (channel != null && channel.isOpen()) {
                try {
                    channel.close();
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
//        8：关闭通道
            if (connection != null && connection.isOpen()) {
                try {
                    connection.close();
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        }
    }
}
/*
执行结果：
SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
SLF4J: Defaulting to no-operation (NOP) logger implementation
SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details.
开始接收信息
收到消息是：Hello dxj1016
 */